PLATE XIX. 
ENGONOCERAS. 
F Page. 
Wines IG, Joe Mela (CHAIN) 5 55 soaks Cheacodes sso aaceseoesetses ee scesodeeassocs 159 
Figs. 1,2. Type specimen from near Lindsborg, Kans., natural size. | 
3. Lateral suture of same, slightly enlarged. 
4,5. Specimen from McPherson County, Kans. Natural size, showing living 
chamber probably almost. complete along the umbilical shoulder and 
about one-half of a volution in length. The crease on the side of the 
venter of fig. 5 is an accident due to compression. Coll. U. 8. Nat. 
Mus. 
6. Lateral suture of opposite or left side, < 23. The curvature is somewhat 
less than it is on the specimen. 
Kiowa shales; Comanche series, Lower Cretaceous; my collection. 
NG Sia 14s En GOnOCerasescrpenevrnecTian | Optic S100) ese arate alee see ghz 
Figs. 7,8. Natural size, living chamber one-half of a volution probably nearly com- 
plete on umbilical shoulder. The venter of inner volution of fig. 8 is 
decidedly concave. 
9. Lateral suture, * 2. 
10. Part of sutures of young fragment, « 2. This specimen is from near Deni- 
son, Tex. : x 
11. Variety with broad ends to the costee and crowded peculiar sutures. 
12. Lateral sutures, x 2. 
13. Ventral view of cast, with similar costeeé. 
14. Suture of same more like those of fig. 9. This is not due to difference of 
age. The last 5 and half of sixth saddle are dorsal. 
Four and one-half miles northeast of Gainesville, Tex., Denison; Washita epoch; 
Coll. U. 8. Geol. Survey. 
HiGs! ToS IemeE ng onacenasin clone Unie livia bt Capps yee ee eee 160 
Fig. 15. Natural size, showing the late age at which the venter remains angulated, 
flat, and without tubercles. The rounded venter of the older stage is in 
’ part due to abrasion. 
16. Shows what was seen of the lateral sutures. 
17. Dorsal suture of same age as oldest suture on fig. 16. 
Near Pottsboro, Tex.; Upper Comanche (Grayson), Washita epoch; Coll. U.S. 
_ Geol. Survey. : 
«The specimen here figured as H. retardum is described as E. uddeni on page 160.—T. W.S 
290 
